| Term | Definition |
|---|---|
| work | the transfer of energy to an object by using a force that causes the object to move in the direction of the force |
| machine | a device that helps do work either by overcoming a force or changing the direction of the applied force |
| inclined plane | a simple machine that is a straight, slanted surface, which facilitates the raising of loads; a ramp |
| wedge | a simple machine that is made up of two inclined planes and that moves; often used for cutting |
| screw | a simple machine that consists of an inclined plane wrapped around a cylinder |
| lever | a simple machine that consists of a bar that pivots at a fixed point called a fulcrum |
| pulley | a simple machine that consists of a wheel over which a rope, chair, or wire passes |
| wheel and axle | a simple machine consisting of two circular objects of different sizes; the wheel is the large of the two circular objects |
